Independent Sydney MP Alex Greenwich will soon introduce a private member’s bill to State Parliament to abolish the law, which he says could be used against highly vulnerable teenagers.

”It is already so hard to come to grips with your sexuality,” said Mr Greenwich, who is gay.

Under the NSW Anti-Discrimination Act, it is unlawful for education authorities to refuse admission to, or expel, a student for being gay, lesbian or transgender.Private schools and colleges are explicitly exempt from this law.